Why is Tsunade considered most powerful Kunoichi?

[SenseiSama]

Because she grew a pair unlike Sakura

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[leezagboola]

Because she was named a legendary Sanin, she was like 20 years older than Konan and Mei aswell, she might have been stronger back when she didnt have to use her seal to stay young and was fighting with orochimaru and jiraiya.

 

[Melanin]

Hashirama was revived using edo tensei so it wasnt shown because hashirama doesnt need healing as edo tensei heals the body
Plus cant deny wat Tsunade said her healing being weaker than Hashiramas..its manga fact

Plus if u belive wat the data book always say then Yata deflecting ANYTHING Is true

The databook says no much thing but the exact opposite.

Creation Rebirth is the pinnacle of medical ninjutsu (cellular regeneration).

Madara and Tsunade beg to differ...

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Madara compared The strength of a hundred technique to Hashi's healing powers.

He did not come his healing to creation rebirth.